GOODWILL AND OTHER INTANGIBLE ASSETS - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Goodwill [Line Items]
Goodwill impairment	$ 0	$ 0	$ 80,105,000
Amortization expense for intangible assets	$ 11,100,000	$ 4,400,000	$ 4,500,000
Minimum
Goodwill [Line Items]
Goodwill, impairment rate	0.00%
Useful life	5 years
Maximum
Goodwill [Line Items]
Goodwill, impairment rate	2.50%
Measurement Input, Discount Rate | Minimum
Goodwill [Line Items]
Goodwill, impairment rate	9.00%	2.00%
Measurement Input, Discount Rate | Maximum
Goodwill [Line Items]
Goodwill, impairment rate	16.00%	5.00%
Other Intangible Assets | Minimum
Goodwill [Line Items]
Useful life	4 years
Other Intangible Assets | Maximum
Goodwill [Line Items]
Useful life	15 years